Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes
International audience The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern...
Published in: | Journal of Marine Systems |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://hal.science/hal-03295922 https://hal.science/hal-03295922/document https://hal.science/hal-03295922/file/S0924796321001081.pdf https://doi.org/10.1016/j.jmarsys.2021.103612 |
id |
ftunivrochelle:oai:HAL:hal-03295922v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivrochelle:oai:HAL:hal-03295922v1 2024-05-12T08:03:09+00:00 Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes Aubone, Nicolas Saraceno, M. Torres Alberto, M.L. Campagna, J. Le Ster, Loïc Picard, Baptiste Hindell, Mark Campagna, C. Guinet, Chirstophe Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA) Instituto de Investigaciones Marinas y Costeras (IIMyC/UNMdP-CONICET) Centro para el Estudio de Sistemas Marinos (CESIMAR/CENPAT-CONICET) (CESIMAR) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institute for Marine and Antarctic Studies and Centre for Marine Socioecology University of Tasmania Hobart, Australia (UTAS) Wildlife Conservation Society Argentina Ciudad Autónoma de Buenos Aires 2021-07 https://hal.science/hal-03295922 https://hal.science/hal-03295922/document https://hal.science/hal-03295922/file/S0924796321001081.pdf https://doi.org/10.1016/j.jmarsys.2021.103612 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103612 hal-03295922 https://hal.science/hal-03295922 https://hal.science/hal-03295922/document https://hal.science/hal-03295922/file/S0924796321001081.pdf doi:10.1016/j.jmarsys.2021.103612 PII: S0924-7963(21)00108-1 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-03295922 Journal of Marine Systems, 2021, 223, pp.103612. ⟨10.1016/j.jmarsys.2021.103612⟩ Southwestern Atlantic Ocean Patagonian shelf slope Elephant seals Mirounga leonina Malvinas current [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2021 ftunivrochelle https://doi.org/10.1016/j.jmarsys.2021.103612 2024-04-17T15:19:17Z International audience The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga leonina. We report here on changes in the foraging behavior of a female seal explained by the combined effect of a cold and high salinity water mass and a decrease in surface chlorophyll-a concentration. Behavioral and oceanographic data from about 5000 profiles of temperature, conductivity, pressure, light and prey encounters were collected within an area ranging 59.5–61°W and 46–47.5°S, at depths of 300–700 m, on the Patagonian slope, during November–December 2018. A decrease in temperature (0.15 °C) and an increase in salinity (0.03) was found below the mixed layer, during December. Light data revealed a significant increase of irradiance in December (almost reaching the ocean bottom) associated with a decrease of chlorophyll-a in the upper levels. Concomitantly, the seal had a different diving behavior in December, foraging near the surface at night and close to the bottom during daylight hours. Also, the seal doubled the prey capture attempts in December compared to November. This study reveals the importance of ocean physical properties on seal's diving and foraging behavior, and how this changes, although small, can impact on seals diet and body composition during their post-breeding trips. Article in Journal/Newspaper Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal HAL - Université de La Rochelle Journal of Marine Systems 223 103612 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Southwestern Atlantic Ocean Patagonian shelf slope Elephant seals Mirounga leonina Malvinas current [SDE]Environmental Sciences |
spellingShingle |
Southwestern Atlantic Ocean Patagonian shelf slope Elephant seals Mirounga leonina Malvinas current [SDE]Environmental Sciences Aubone, Nicolas Saraceno, M. Torres Alberto, M.L. Campagna, J. Le Ster, Loïc Picard, Baptiste Hindell, Mark Campagna, C. Guinet, Chirstophe Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
topic_facet |
Southwestern Atlantic Ocean Patagonian shelf slope Elephant seals Mirounga leonina Malvinas current [SDE]Environmental Sciences |
description |
International audience The Patagonian slope is the region where Subantarctic waters and bathymetry give raise to physical and ecological processes that support a rich biodiversity and a large-scale industrial fisheries. Unique among the species that depend on this region is the deep diving southern elephant seal, Mirounga leonina. We report here on changes in the foraging behavior of a female seal explained by the combined effect of a cold and high salinity water mass and a decrease in surface chlorophyll-a concentration. Behavioral and oceanographic data from about 5000 profiles of temperature, conductivity, pressure, light and prey encounters were collected within an area ranging 59.5–61°W and 46–47.5°S, at depths of 300–700 m, on the Patagonian slope, during November–December 2018. A decrease in temperature (0.15 °C) and an increase in salinity (0.03) was found below the mixed layer, during December. Light data revealed a significant increase of irradiance in December (almost reaching the ocean bottom) associated with a decrease of chlorophyll-a in the upper levels. Concomitantly, the seal had a different diving behavior in December, foraging near the surface at night and close to the bottom during daylight hours. Also, the seal doubled the prey capture attempts in December compared to November. This study reveals the importance of ocean physical properties on seal's diving and foraging behavior, and how this changes, although small, can impact on seals diet and body composition during their post-breeding trips. |
author2 |
Centro de Investigaciones del Mar y la Atmósfera (CIMA/CONICET-UBA) Instituto de Investigaciones Marinas y Costeras (IIMyC/UNMdP-CONICET) Centro para el Estudio de Sistemas Marinos (CESIMAR/CENPAT-CONICET) (CESIMAR) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Institute for Marine and Antarctic Studies and Centre for Marine Socioecology University of Tasmania Hobart, Australia (UTAS) Wildlife Conservation Society Argentina Ciudad Autónoma de Buenos Aires |
format |
Article in Journal/Newspaper |
author |
Aubone, Nicolas Saraceno, M. Torres Alberto, M.L. Campagna, J. Le Ster, Loïc Picard, Baptiste Hindell, Mark Campagna, C. Guinet, Chirstophe |
author_facet |
Aubone, Nicolas Saraceno, M. Torres Alberto, M.L. Campagna, J. Le Ster, Loïc Picard, Baptiste Hindell, Mark Campagna, C. Guinet, Chirstophe |
author_sort |
Aubone, Nicolas |
title |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_short |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_full |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_fullStr |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_full_unstemmed |
Physical changes recorded by a deep diving seal on the Patagonian slope drive large ecological changes |
title_sort |
physical changes recorded by a deep diving seal on the patagonian slope drive large ecological changes |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03295922 https://hal.science/hal-03295922/document https://hal.science/hal-03295922/file/S0924796321001081.pdf https://doi.org/10.1016/j.jmarsys.2021.103612 |
genre |
Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal |
genre_facet |
Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-03295922 Journal of Marine Systems, 2021, 223, pp.103612. ⟨10.1016/j.jmarsys.2021.103612⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jmarsys.2021.103612 hal-03295922 https://hal.science/hal-03295922 https://hal.science/hal-03295922/document https://hal.science/hal-03295922/file/S0924796321001081.pdf doi:10.1016/j.jmarsys.2021.103612 PII: S0924-7963(21)00108-1 |
op_rights |
http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2021.103612 |
container_title |
Journal of Marine Systems |
container_volume |
223 |
container_start_page |
103612 |
_version_ |
1798845262170423296 |